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Department of Geology and Geography

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Location

Frenchman Mountain (Las Vegas)

The first day in the field we visited the "Great Unconfomity" at Frenchman Mountain, just east of Las Vegas. At this location, Paleozoic strata overlie PreCambrian schist and granite in a special kind of unconfromity know as a nonconformity. This unconfromity is called "Great" because it represents approximately 1.2 billions years (or about 25% of the Earth age).